Xfail on tests for TOML 1.1 features not yet supported

Author: hukkin

tests/test_data.py

@@ -8,12 +8,6 @@
 
 from . import burntsushi, tomllib
 
-
-class MissingFile:
-    def __init__(self, path: Path):
-        self.path = path
-
-
 DATA_DIR = Path(__file__).parent / "data"
 
 VALID_FILES = tuple((DATA_DIR / "valid").glob("**/*.toml"))
@@ -22,10 +16,7 @@ def __init__(self, path: Path):
 _expected_files = []
 for p in VALID_FILES:
     json_path = p.with_suffix(".json")
-    try:
-        text = json.loads(json_path.read_bytes().decode())
-    except FileNotFoundError:
-        text = MissingFile(json_path)
+    text = json.loads(json_path.read_bytes().decode())
     _expected_files.append(text)
 VALID_FILES_EXPECTED = tuple(_expected_files)
 
@@ -49,15 +40,25 @@ def test_invalid(self):
     def test_valid(self):
         for valid, expected in zip(VALID_FILES, VALID_FILES_EXPECTED):
             with self.subTest(msg=valid.stem):
-                if isinstance(expected, MissingFile):
-                    # For a poor man's xfail, assert that this is one of the
-                    # test cases where expected data is known to be missing.
-                    assert valid.stem in {
-                        "qa-array-inline-nested-1000",
-                        "qa-table-inline-nested-1000",
-                    }
-                    continue
                 toml_str = valid.read_bytes().decode()
+
+                # xfail on TOML 1.1 compatibility tests that Tomli isn't
+                # compatible with yet.
+                if valid.stem in {
+                    "no-seconds",
+                    "newline",
+                    "newline-comment",
+                    "hex-escape",
+                    "common-47",
+                    "common-34",
+                    "common-31",
+                    "common-29",
+                    "common-12",
+                }:
+                    with self.assertRaises(tomllib.TOMLDecodeError):
+                        tomllib.loads(toml_str)
+                    continue
+
                 actual = tomllib.loads(toml_str)
                 actual = burntsushi.convert(actual)  # type: ignore[no-untyped-call]
                 expected = burntsushi.normalize(expected)